/**
 *
 *                                  Apache License
 *                            Version 2.0, January 2004
 *                         http://www.apache.org/licenses/
 *
 *    TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
 *
 *    1. Definitions.
 *
 *       "License" shall mean the terms and conditions for use, reproduction,
 *       and distribution as defined by Sections 1 through 9 of this document.
 *
 *       "Licensor" shall mean the copyright owner or entity authorized by
 *       the copyright owner that is granting the License.
 *
 *       "Legal Entity" shall mean the union of the acting entity and all
 *       other entities that control, are controlled by, or are under common
 *       control with that entity. For the purposes of this definition,
 *       "control" means (i) the power, direct or indirect, to cause the
 *       direction or management of such entity, whether by contract or
 *       otherwise, or (ii) ownership of fifty percent (50%) or more of the
 *       outstanding shares, or (iii) beneficial ownership of such entity.
 *
 *       "You" (or "Your") shall mean an individual or Legal Entity
 *       exercising permissions granted by this License.
 *
 *       "Source" form shall mean the preferred form for making modifications,
 *       including but not limited to software source code, documentation
 *       source, and configuration files.
 *
 *       "Object" form shall mean any form resulting from mechanical
 *       transformation or translation of a Source form, including but
 *       not limited to compiled object code, generated documentation,
 *       and conversions to other media types.
 *
 *       "Work" shall mean the work of authorship, whether in Source or
 *       Object form, made available under the License, as indicated by a
 *       copyright notice that is included in or attached to the work
 *       (an example is provided in the Appendix below).
 *
 *       "Derivative Works" shall mean any work, whether in Source or Object
 *       form, that is based on (or derived from) the Work and for which the
 *       editorial revisions, annotations, elaborations, or other modifications
 *       represent, as a whole, an original work of authorship. For the purposes
 *       of this License, Derivative Works shall not include works that remain
 *       separable from, or merely link (or bind by name) to the interfaces of,
 *       the Work and Derivative Works thereof.
 *
 *       "Contribution" shall mean any work of authorship, including
 *       the original version of the Work and any modifications or additions
 *       to that Work or Derivative Works thereof, that is intentionally
 *       submitted to Licensor for inclusion in the Work by the copyright owner
 *       or by an individual or Legal Entity authorized to submit on behalf of
 *       the copyright owner. For the purposes of this definition, "submitted"
 *       means any form of electronic, verbal, or written communication sent
 *       to the Licensor or its representatives, including but not limited to
 *       communication on electronic mailing lists, source code control systems,
 *       and issue tracking systems that are managed by, or on behalf of, the
 *       Licensor for the purpose of discussing and improving the Work, but
 *       excluding communication that is conspicuously marked or otherwise
 *       designated in writing by the copyright owner as "Not a Contribution."
 *
 *       "Contributor" shall mean Licensor and any individual or Legal Entity
 *       on behalf of whom a Contribution has been received by Licensor and
 *       subsequently incorporated within the Work.
 *
 *    2. Grant of Copyright License. Subject to the terms and conditions of
 *       this License, each Contributor hereby grants to You a perpetual,
 *       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
 *       copyright license to reproduce, prepare Derivative Works of,
 *       publicly display, publicly perform, sublicense, and distribute the
 *       Work and such Derivative Works in Source or Object form.
 *
 *    3. Grant of Patent License. Subject to the terms and conditions of
 *       this License, each Contributor hereby grants to You a perpetual,
 *       worldwide, non-exclusive, no-charge, royalty-free, irrevocable
 *       (except as stated in this section) patent license to make, have made,
 *       use, offer to sell, sell, import, and otherwise transfer the Work,
 *       where such license applies only to those patent claims licensable
 *       by such Contributor that are necessarily infringed by their
 *       Contribution(s) alone or by combination of their Contribution(s)
 *       with the Work to which such Contribution(s) was submitted. If You
 *       institute patent litigation against any entity (including a
 *       cross-claim or counterclaim in a lawsuit) alleging that the Work
 *       or a Contribution incorporated within the Work constitutes direct
 *       or contributory patent infringement, then any patent licenses
 *       granted to You under this License for that Work shall terminate
 *       as of the date such litigation is filed.
 *
 *    4. Redistribution. You may reproduce and distribute copies of the
 *       Work or Derivative Works thereof in any medium, with or without
 *       modifications, and in Source or Object form, provided that You
 *       meet the following conditions:
 *
 *       (a) You must give any other recipients of the Work or
 *           Derivative Works a copy of this License; and
 *
 *       (b) You must cause any modified files to carry prominent notices
 *           stating that You changed the files; and
 *
 *       (c) You must retain, in the Source form of any Derivative Works
 *           that You distribute, all copyright, patent, trademark, and
 *           attribution notices from the Source form of the Work,
 *           excluding those notices that do not pertain to any part of
 *           the Derivative Works; and
 *
 *       (d) If the Work includes a "NOTICE" text file as part of its
 *           distribution, then any Derivative Works that You distribute must
 *           include a readable copy of the attribution notices contained
 *           within such NOTICE file, excluding those notices that do not
 *           pertain to any part of the Derivative Works, in at least one
 *           of the following places: within a NOTICE text file distributed
 *           as part of the Derivative Works; within the Source form or
 *           documentation, if provided along with the Derivative Works; or,
 *           within a display generated by the Derivative Works, if and
 *           wherever such third-party notices normally appear. The contents
 *           of the NOTICE file are for informational purposes only and
 *           do not modify the License. You may add Your own attribution
 *           notices within Derivative Works that You distribute, alongside
 *           or as an addendum to the NOTICE text from the Work, provided
 *           that such additional attribution notices cannot be construed
 *           as modifying the License.
 *
 *       You may add Your own copyright statement to Your modifications and
 *       may provide additional or different license terms and conditions
 *       for use, reproduction, or distribution of Your modifications, or
 *       for any such Derivative Works as a whole, provided Your use,
 *       reproduction, and distribution of the Work otherwise complies with
 *       the conditions stated in this License.
 *
 *    5. Submission of Contributions. Unless You explicitly state otherwise,
 *       any Contribution intentionally submitted for inclusion in the Work
 *       by You to the Licensor shall be under the terms and conditions of
 *       this License, without any additional terms or conditions.
 *       Notwithstanding the above, nothing herein shall supersede or modify
 *       the terms of any separate license agreement you may have executed
 *       with Licensor regarding such Contributions.
 *
 *    6. Trademarks. This License does not grant permission to use the trade
 *       names, trademarks, service marks, or product names of the Licensor,
 *       except as required for reasonable and customary use in describing the
 *       origin of the Work and reproducing the content of the NOTICE file.
 *
 *    7. Disclaimer of Warranty. Unless required by applicable law or
 *       agreed to in writing, Licensor provides the Work (and each
 *       Contributor provides its Contributions) on an "AS IS" BASIS,
 *       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 *       implied, including, without limitation, any warranties or conditions
 *       of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
 *       PARTICULAR PURPOSE. You are solely responsible for determining the
 *       appropriateness of using or redistributing the Work and assume any
 *       risks associated with Your exercise of permissions under this License.
 *
 *    8. Limitation of Liability. In no event and under no legal theory,
 *       whether in tort (including negligence), contract, or otherwise,
 *       unless required by applicable law (such as deliberate and grossly
 *       negligent acts) or agreed to in writing, shall any Contributor be
 *       liable to You for damages, including any direct, indirect, special,
 *       incidental, or consequential damages of any character arising as a
 *       result of this License or out of the use or inability to use the
 *       Work (including but not limited to damages for loss of goodwill,
 *       work stoppage, computer failure or malfunction, or any and all
 *       other commercial damages or losses), even if such Contributor
 *       has been advised of the possibility of such damages.
 *
 *    9. Accepting Warranty or Additional Liability. While redistributing
 *       the Work or Derivative Works thereof, You may choose to offer,
 *       and charge a fee for, acceptance of support, warranty, indemnity,
 *       or other liability obligations and/or rights consistent with this
 *       License. However, in accepting such obligations, You may act only
 *       on Your own behalf and on Your sole responsibility, not on behalf
 *       of any other Contributor, and only if You agree to indemnify,
 *       defend, and hold each Contributor harmless for any liability
 *       incurred by, or claims asserted against, such Contributor by reason
 *       of your accepting any such warranty or additional liability.
 *
 *    END OF TERMS AND CONDITIONS
 *
 *    APPENDIX: How to apply the Apache License to your work.
 *
 *       To apply the Apache License to your work, attach the following
 *       boilerplate notice, with the fields enclosed by brackets "[]"
 *       replaced with your own identifying information. (Don't include
 *       the brackets!)  The text should be enclosed in the appropriate
 *       comment syntax for the file format. We also recommend that a
 *       file or class name and description of purpose be included on the
 *       same "printed page" as the copyright notice for easier
 *       identification within third-party archives.
 *
 *    Copyright 2016 Alibaba Group
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.taobao.weex.ui.view.refresh.circlebar;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RadialGradient;
import android.graphics.Shader;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.animation.Animation;
import android.widget.ImageView;

/**
 * Modify of android.support.v4
 */
public class CircleProgressBar extends ImageView {

  private static final int KEY_SHADOW_COLOR = 0x1E000000;
  private static final int FILL_SHADOW_COLOR = 0x3D000000;
  private static final float X_OFFSET = 0f;
  private static final float Y_OFFSET = 1.75f;
  private static final float SHADOW_RADIUS = 3.5f;
  private static final int SHADOW_ELEVATION = 4;

  public static final int DEFAULT_CIRCLE_BG_LIGHT = 0xFFFAFAFA;
  public static final int DEFAULT_CIRCLE_COLOR = 0xFFF00000;
  private static final int DEFAULT_CIRCLE_DIAMETER = 40;
  private static final int STROKE_WIDTH_LARGE = 3;

  private Animation.AnimationListener mListener;
  private int mShadowRadius;
  private int mBackGroundColor;
  private int mProgressColor;
  private int mProgressStokeWidth;
  private int mArrowWidth;
  private int mArrowHeight;
  private int mProgress;
  private int mMax;
  private int mDiameter;
  private int mInnerRadius;
  private boolean mShowArrow;
  public MaterialProgressDrawable mProgressDrawable;
  private ShapeDrawable mBgCircle;
  private boolean mCircleBackgroundEnabled;
  private int[] mColors = new int[]{Color.BLACK};

  public CircleProgressBar(Context context) {
    super(context);
    init(context, null, 0);

  }

  public CircleProgressBar(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(context, attrs, 0);

  }

  public CircleProgressBar(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init(context, attrs, defStyleAttr);
  }

  private void init(Context context, AttributeSet attrs, int defStyleAttr) {

    final float density = getContext().getResources().getDisplayMetrics().density;
    mBackGroundColor = DEFAULT_CIRCLE_BG_LIGHT;
    mProgressColor = DEFAULT_CIRCLE_COLOR;
    mColors = new int[]{mProgressColor};
    mInnerRadius = -1;
    mProgressStokeWidth = (int) (STROKE_WIDTH_LARGE * density);
    mArrowWidth =  -1;
    mArrowHeight = -1;
    mShowArrow = true;
    mCircleBackgroundEnabled = true;
    mProgress = 0;
    mMax = 100;
    mProgressDrawable = new MaterialProgressDrawable(getContext(), this);
    super.setImageDrawable(mProgressDrawable);
  }

  public void setProgressBackGroundColor(int color) {
    this.mBackGroundColor = color;
  }

  private boolean elevationSupported() {
    return android.os.Build.VERSION.SDK_INT >= 21;
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    if (!elevationSupported()) {
      setMeasuredDimension(getMeasuredWidth() + mShadowRadius * 2, getMeasuredHeight()
                                                                   + mShadowRadius * 2);
    }
  }

  public int getProgressStokeWidth() {
    return mProgressStokeWidth;
  }

  public void setProgressStokeWidth(int mProgressStokeWidth) {
    final float density = getContext().getResources().getDisplayMetrics().density;
    this.mProgressStokeWidth = (int) (mProgressStokeWidth * density);
  }

  @Override
  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    super.onLayout(changed, left, top, right, bottom);
    final float density = getContext().getResources().getDisplayMetrics().density;
    mDiameter = Math.min(getMeasuredWidth(), getMeasuredHeight());
    if (mDiameter <= 0) {
      mDiameter = (int) density * DEFAULT_CIRCLE_DIAMETER;
    }
    if (getBackground() == null && mCircleBackgroundEnabled) {
      final int shadowYOffset = (int) (density * Y_OFFSET);
      final int shadowXOffset = (int) (density * X_OFFSET);
      mShadowRadius = (int) (density * SHADOW_RADIUS);

      if (elevationSupported()) {
        mBgCircle = new ShapeDrawable(new OvalShape());
        ViewCompat.setElevation(this, SHADOW_ELEVATION * density);
      } else {
        OvalShape oval = new OvalShadow(mShadowRadius, mDiameter - mShadowRadius * 2);
        mBgCircle = new ShapeDrawable(oval);
        ViewCompat.setLayerType(this, ViewCompat.LAYER_TYPE_SOFTWARE, mBgCircle.getPaint());
        mBgCircle.getPaint().setShadowLayer(mShadowRadius, shadowXOffset, shadowYOffset,
                                            KEY_SHADOW_COLOR);
        final int padding = (int) mShadowRadius;
        // set padding so the inner image sits correctly within the shadow.
        setPadding(padding, padding, padding, padding);
      }
      mBgCircle.getPaint().setColor(mBackGroundColor);
      setBackgroundDrawable(mBgCircle);
    }
    mProgressDrawable.setBackgroundColor(mBackGroundColor);
    mProgressDrawable.setColorSchemeColors(mColors);
    if (isShowArrow()) {
      mProgressDrawable.setArrowScale(1f);
      mProgressDrawable.showArrow(true);
    }
    super.setImageDrawable(null);
    super.setImageDrawable(mProgressDrawable);
    mProgressDrawable.setAlpha(255);
    if (getVisibility() == VISIBLE) {
      mProgressDrawable.setStartEndTrim(0, (float) 0.8);
    }
  }

  public boolean isShowArrow() {
    return mShowArrow;
  }

  public void setShowArrow(boolean showArrow) {
    this.mShowArrow = showArrow;
  }

  public void setAnimationListener(Animation.AnimationListener listener) {
    mListener = listener;
  }

  @Override
  public void onAnimationStart() {
    super.onAnimationStart();
    if (mListener != null) {
      mListener.onAnimationStart(getAnimation());
    }
  }

  @Override
  public void onAnimationEnd() {
    super.onAnimationEnd();
    if (mListener != null) {
      mListener.onAnimationEnd(getAnimation());
    }
  }

  /**
   * Set the colors used in the progress animation. The first
   * color will also be the color of the bar that grows in response to a user
   * swipe gesture.
   *
   * @param colors
   */
  public void setColorSchemeColors(int... colors) {
    mColors = colors;
    if (mProgressDrawable != null) {
      mProgressDrawable.setColorSchemeColors(colors);
    }
  }

  /**
   * Update the background color of the mBgCircle image view.
   */
  public void setBackgroundColorResource(int colorRes) {
    if (getBackground() instanceof ShapeDrawable) {
      final Resources res = getResources();
      ((ShapeDrawable) getBackground()).getPaint().setColor(res.getColor(colorRes));
    }
  }

  public void setBackgroundColor(int color) {
    if (getBackground() instanceof ShapeDrawable) {
      ((ShapeDrawable) getBackground()).getPaint().setColor(color);
    }
  }

  public int getMax() {
    return mMax;
  }

  public void setMax(int max) {
    mMax = max;
  }

  public int getProgress() {
    return mProgress;
  }

  public void setProgress(int progress) {
    if (getMax() > 0) {
      mProgress = progress;
    }
    invalidate();
  }

  public boolean circleBackgroundEnabled() {
    return mCircleBackgroundEnabled;
  }

  public void setCircleBackgroundEnabled(boolean enableCircleBackground) {
    this.mCircleBackgroundEnabled = enableCircleBackground;
  }

  @Override
  protected void onAttachedToWindow() {
    super.onAttachedToWindow();
    if (mProgressDrawable != null) {
      mProgressDrawable.stop();
      mProgressDrawable.setVisible(getVisibility() == VISIBLE, false);
    }
  }

  @Override
  protected void onDetachedFromWindow() {
    super.onDetachedFromWindow();
    if (mProgressDrawable != null) {
      mProgressDrawable.stop();
      mProgressDrawable.setVisible(false, false);
    }
  }

  private class OvalShadow extends OvalShape {

    private RadialGradient mRadialGradient;
    private int mShadowRadius;
    private Paint mShadowPaint;
    private int mCircleDiameter;

    public OvalShadow(int shadowRadius, int circleDiameter) {
      super();
      mShadowPaint = new Paint();
      mShadowRadius = shadowRadius;
      mCircleDiameter = circleDiameter;
      mRadialGradient = new RadialGradient(mCircleDiameter / 2, mCircleDiameter / 2,
                                           mShadowRadius, new int[]{
          FILL_SHADOW_COLOR, Color.TRANSPARENT
      }, null, Shader.TileMode.CLAMP);
      mShadowPaint.setShader(mRadialGradient);
    }

    @Override
    public void draw(Canvas canvas, Paint paint) {
      final int viewWidth = CircleProgressBar.this.getWidth();
      final int viewHeight = CircleProgressBar.this.getHeight();
      canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2 + mShadowRadius),
                        mShadowPaint);
      canvas.drawCircle(viewWidth / 2, viewHeight / 2, (mCircleDiameter / 2), paint);
    }
  }

  public void start() {
    mProgressDrawable.start();
  }

  public void setStartEndTrim(float startAngle, float endAngle) {
    mProgressDrawable.setStartEndTrim(startAngle, endAngle);
  }

  public void stop() {
    mProgressDrawable.stop();
  }

  public void setProgressRotation(float rotation) {
    mProgressDrawable.setProgressRotation(rotation);
  }
}